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Prebiotic potential of some exopolysaccharides produced by lactic acidbacteria
Tijdschriftbijdrage - Tijdschriftartikel
The aims of this study were to investigate the digestibility and the stability of six
exopolysaccharides (EPS) produced by lactic acid bacteria isolated from raw milk and traditional
fermented dairy products, and to evaluate their prebiotic potential. Four homopolysaccharides (HoPS,
composed of glucose solely) produced by Lactococcus lactis 1.8, Leuconostoc citreum 1.12, Leuc.
citreum 2.8, and Weissella confusa/cibaria 38.2 and two heteropolysaccharides (HePS) produced by
Streptococcus thermophilus ST 111 (repeating unit composed of galactose and rhamnose in a 5:2 ratio)
and S. thermophilus LY03 (repeating unit with a galactose:glucose ratio of 4:1) were tested. No
degradation of the six EPS was seen during in vitro digestions mimicking the passage through the upper
gastrointestinal tract. The two Clostridium strains used in the present study as well as Anaerostipes
caccae LMG 14662T and Roseburia intestinalis LMG 14610T could not metabolize any of the six EPS
tested, while the two Bacteroides strains grew on all EPS and L. casei YIT 9029 grew on all HoPS. The
HoPS of L. lactis 1.8 proved to be the most susceptible for degradation, particularly by Bifidobacterium
pseudocatenulatum LMG 10505T. The fermentation profile of L. lactis 1.8 EPS by B.
pseudocatenulatum LMG 10505T indicated the prebiotic potential of this substrate.
exopolysaccharides (EPS) produced by lactic acid bacteria isolated from raw milk and traditional
fermented dairy products, and to evaluate their prebiotic potential. Four homopolysaccharides (HoPS,
composed of glucose solely) produced by Lactococcus lactis 1.8, Leuconostoc citreum 1.12, Leuc.
citreum 2.8, and Weissella confusa/cibaria 38.2 and two heteropolysaccharides (HePS) produced by
Streptococcus thermophilus ST 111 (repeating unit composed of galactose and rhamnose in a 5:2 ratio)
and S. thermophilus LY03 (repeating unit with a galactose:glucose ratio of 4:1) were tested. No
degradation of the six EPS was seen during in vitro digestions mimicking the passage through the upper
gastrointestinal tract. The two Clostridium strains used in the present study as well as Anaerostipes
caccae LMG 14662T and Roseburia intestinalis LMG 14610T could not metabolize any of the six EPS
tested, while the two Bacteroides strains grew on all EPS and L. casei YIT 9029 grew on all HoPS. The
HoPS of L. lactis 1.8 proved to be the most susceptible for degradation, particularly by Bifidobacterium
pseudocatenulatum LMG 10505T. The fermentation profile of L. lactis 1.8 EPS by B.
pseudocatenulatum LMG 10505T indicated the prebiotic potential of this substrate.
Tijdschrift: Romanian Biotechnological Letters
ISSN: 1224-5984
Issue: 5
Volume: 18
Pagina's: 8666-8676
Jaar van publicatie:2013
Trefwoorden:prebiotics,, exopolysaccharides,, fermented dairy products, lactic acid bacteria